Concrete pole



E. B. BLINN.

CONCRETE POLE.

APPLICATION HLED 0m. 27. 1919.

Patented Sept. 21, 1920..

E. B. BLINN.

" CONCRETE POLE.

APPLICATION nuzo 001.27. 1919.

1,353,369. PatentedSept.21 2SHEETS-$H /7/J (AWE/"nay r U E STATES Emswiin B. BLINN,

PATENT FF E;-

orrAsAnENn, cALiroRNIA, AssIGnoR" or ONE-THIRD T ENRY BARKSCI-IAT, or Los ANGELES,@QA'LIEORNI'A;

ooncnnrn row. I

To allwhom itmay concern:

.21 8 it known that I, EDMUN B. BLINN, a citizen of the United States, residing at Pasadena, in the county of Los Angeles,

State of California, have invented new and useful Improvements in ConcretePoles, of which the following is a specification.

This inventionrelates'to poles. and particularly to poles such as are used for lamps,

or for supporting wires of various kinds, forinstance, telephone, wires, telegraph wires, s ignal wires, etc. Itis an object of this invention to provide a simple, sightly pole construction of. this generalconstruction by which a pole maybe provided which requires no hooks or special apparatus to be employed by a person climbing it.

The invention is particularly adapted to be applied or used in connection withmono-. lithic concrete poles and the like, although it is not limited to such application it being readily applicable 'to metal poles or wooden poles, etc. The invention provides steps in Or on the poleso spaced and shaped that a person can easily and safely climb the pole. In the case of a concrete poleor castmetal pole the steps are formed in the concrete i 'or metal when the pole is made and are either indentations or projections extending around the pole completely or partially as will be hereinafter explained in detail.

Verticalribs formed depressions or projections are provided in the pole, be- .tween the steps, which projections or depressionsprovide grips or hand holds fora person climbing the pole. Theribs'or depressions are a particularfeature of the invention as theyv provide convenient grips for a person and makeit unnecessary for the person to wrap his arms around the pole. 1

The simplicity, of the invention makes it possible to easily and inexpensively embody it in poles without effecting their strength or sightliness. The fact that the invention may be embodied in a pole at very little expense makes it of great commercial value.

Further objects and features of the invention will be clearly understood from the following detailed description of a preferred embodiment of the invention throughout which reference is had to the ac- Y is not limited. to any particular method of Specification of Letters Patent. Patented Sept. 1920. Applicationfiled October 27,-1.919. Serial No. 333,546. 1

section taken asindicated {on I Fig. 1 Fig. 3 is. an enlargedsection taken as thetop of the pole; Fig-4 is a view of a section or portion of pole showing a .form

ofconstruction which can be used; Fig. :5 is .a'view similar -to Fig. 4 of. another form of construction; Fig. 6 is a sectionalview'of a :portionof the pole in which the'pole is formed showing the manner in which the I a viewta-ken asindicated by line 1 0-10'on I Fig. 9; and Fig. 11 is a view similar'to Fig. 9 of another form ofconstruction. P

Throughout the drawingsnumeral 10 designates a typical pole such as is used for supporting wires of various kinds. The pole l0 extends'into the ground v11 andmay' be anchoredor supported inv any ordinary manner. A cross arm 18 for carrying wires may be attached'to'the'pole nearits upper end as shown in-Figglp The heightor size of the pole makes no material difference and it will beunderstood;thattheparticular pole herein shown and described is merely typical and for purpose of illustration.

. The pole 10 may be made of variousmaterials and may be in; sections although it is 7' vatvery .low cost and the embodying'of the present invention adds practically nothing .tothe cost of the poles. When the pole is monolithic concrete or metal it is preferably formed in a mold. Although the invention forming the poleit is preferred that it be formed in a mold whichis rotated so that the concrete is packed by centrifugal force and so that a. hole is left through the center .of'the pole, as illustrated in the drawings.

It has been found by practice that monolithic concrete poles require or are greatly strengthened by metallic reinforcement. In the preferred form of construction I provide the pole with longitudinal reinforcing wires 16 and a. coiled wire 15, as shown in the drawings. 'In the preferred method .of

construction the reinforcing wires 15 and 16 are bound togetherf at their points of intersection by wire or the like. 1 Before the concrete is poured into the mold and before the mold is rotated the reinforcing frame,

7 formed by the wires, 'is' placed in the mold thereby preventing water from and spaced or held in position by blocks 18 which engage the side wall 19 of the mold.

The blocks 18 are concrete having embedded in them wires- 20 by which the reinforcing frame is connected tothem. The blocks 18 are so arranged in the mold as to support the reinforcing frame and prevent it from becoming displaced-or disarranged by centrifugal force :when the mold is being rotated. I It will be readily understood how rotation of the mold causes packing of the 1 concrete around the blocks 18 and embeds them in'the-body of the' pole so that they can not be detected in thefinished article.

7 The hole .22 which is left in the pole may befused to carry wires 25 from the ground to the top of the pole Where they' may be attached to wires being carried by the cross arm 13. In the preferred form of constructionthe hole 26 near the top of the pole The mold in which the'pole is-cast is of such a configuration as to cause suitable flanges or steps 40 to be formed in the pole at regular intervals as shown inFig. '1. The

steps may be formed along the entire length of the pole although it is preferred that the portion just above the ground-be plain as shownin Fig. 1. The upperfaces' 42 of the flanges 40 are fiat and the flanges extend entirely around the pole' forming steps as shown in the drawings. The flanges ex- 7 tending entirely around the pole provide stepson allsides of the pole and make it look uniform and sightly; It will be understood however, that the steps do not necesr sarilyhaveto extend entirely around the pole but may extend only partially around it.

In Figs. 4: and 5 other forms of steps are shown which may be advantageously used. In the form of construction shown in Fig. 4 indentations 50 are provided in the pole, in place of projections, so that fiat steps 5l'are formed. In the form shown in Fig. 5 steps 52 are formed in the pole and the wall of the pole between the steps tapers inwardly and downwardly as clearly shown in the figure Extending radially from the pole between the steps there are vertical ribs which formhand holds. The ribs 60- when arranged as shown in Figs. 1' and 2"pro vid e convenient and effective hand holds which a person may grip when climbing the pole. It will be readily understood that the ribs 60 may extend any desired distance from V the pole and that there maybe any desired number or arrangement of ribs. In the preferred form of the invention the ribs 60 are formed integral with the pole although it will be readily understood that they may be I made separate and attached to the pole if so desired.- x

In Fig. 7 a form of hand hold construction is'shown in which indentations 90 are provided in placev of projections. This'form of construction is very easily embodied in the pole and is very effective. v A form of hand hold *construc tion is shown in Fig. 8 inwhich both indentations and projections are used." The indentations 90 are preferably not as deep as the inden-. tations '90 in the form showninFig'. 7.

This form of construction is very ornamental and'is at the same time very effective.

In Figs.'9, 10 and 11 a form of construction is shown in which the top or uppermost section 81 ofthe pole is square or substantially square in cross sectional configuration. In this'form of construction recesses are provided in opposite sides of-the pole toreceive the cross arms 13. The cross arms 13 being carried in the recesses 80 are firmly held in" a horizontal position without the'aid of brace'rods, etc- The recesses being opposite each other as showninFig. 10 make it possible to hold'the cross bars 13 in place by simple tie bolts 85. In cases where only one cross bar 13isdesired a short blockfl i of wood or metal can be substituted for one of the cross bars as shown in Fig. 11. "The square construction shown at 81 in,Figs."9

and 10 canbe used through the entire pole ifso desired although it is preferred that it be used only where the cross bars are attached to the pole.

Although I have explained'my invention as embodied in a monolithic concrete pole it will beunderstood that I do not wish'to limit myself to suchapplications as it-can be advantageously used in connection with cast metal or woodpoles built up or seetional pol'es'. When the invention is used in connection with built up or. sectional poles the steps and ribs may be formedintegral with the body of the pole or they maybe formed separately and afterward attached.

Having described a preferred embodiment of my invention Ido notwis'h to limit myself to the particular details hereinabove set forth but wish to reserve to myself any changes or modifications that may appear to those skilled in the art or: fall Within the 13c scope of the following claims.

Having described a preferred form of my invention, I claim:

'1. A concrete pole having a plurality of integral laterally projecting flanges formed thereon, and a plurality. of ribs extending longitudinally thereof between said flanges, for the purpose described.

v 2. A pole provided with a plurality of an- 7 nular flanges constituting steps and havinga plurality of longitudinally extending grooves formed in its body above each flange to provide hand holds.

VA tubular pole provided with a plural'-' body immediately abovefeach flange being reduced in diameter;

\ In witness that I claim the foregoing I I have hereunto subscribed my namethis 18th a n day of October, 1919.

Witness:

VIRGINIA BERINGER.

EDMUNDQB. :BLlNN'. I 

